One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,14,19,15,20,35,47)(11,21,24,38,25,46,34,16)(12,26,30,55,29,17,39,42)(13,18,32,44,33,45,62,67)(22,50,52,36,27,48,57,40)(23,49,53,43,31,60,61,37)(28,54,59,71,58,41,64,66)(51,69,70,63,56,68,72,65)(9,11,15,25)(10,16,20,38)(12,27,29,22)(13,31,33,23)(14,34,35,24)(17,40,26,36)(18,43,45,37)(19,46,47,21)(28,56,58,51)(30,52,39,57)(32,53,62,61)(41,65,54,63)(42,48,55,50)(44,49,67,60)(59,70,64,72)(66,68,71,69)(2,5)(6,8)(9,12,14,30,15,29,35,39)(10,17,19,42,20,26,47,55)(11,22,24,52,25,27,34,57)(13,28,32,59,33,58,62,64)(16,36,21,48,38,40,46,50)(18,41,44,66,45,54,67,71)(23,51,53,70,31,56,61,72)(37,63,49,68,43,65,60,69)(9,13,14,32,15,33,35,62)(10,18,19,44,20,45,47,67)(11,23,24,53,25,31,34,61)(12,28,30,59,29,58,39,64)(16,37,21,49,38,43,46,60)(17,41,42,66,26,54,55,71)(22,51,52,70,27,56,57,72)(36,63,48,68,40,65,50,69)(1,3,4,7)(2,6,5,8)(12,29)(17,26)(22,27)(28,58)(30,39)(36,40)(41,54)(42,55)(48,50)(51,56)(52,57)(59,64)(63,65)(66,71)(68,69)(70,72)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.